condition mean min max ZT0-3 2.7884425 2.659125 2.91776 ZT4-7 2.49785 2.49785 2.49785 ZT8-11 1.33301 1.33301 1.33301 ZT12-15 0 0 0 ZT16-19 2.46665 2.46665 2.46665 ZT20-23 0.6931345 0.6931345 0.6931345